diff --git a/ssl/statem_ntls/statem_ntls.c b/ssl/statem_ntls/statem_ntls.c
index 430bb18df..80bf4d26c 100644
--- a/ssl/statem_ntls/statem_ntls.c
+++ b/ssl/statem_ntls/statem_ntls.c
@@ -264,14 +264,14 @@ int SSL_connection_is_ntls(SSL *s, int is_server)
          * have to get the server version from clientHello
          */
         if (SSL_IS_FIRST_HANDSHAKE(s) && SSL_in_before(s)) {
-            int ret, fd;
+            int ret, fd = -1;
             PACKET pkt;
             unsigned int version, type;
             unsigned char buf[PEEK_HEADER_LENGTH];
 
-            ret = BIO_get_fd(s->rbio, &fd);
+            (void) BIO_get_fd(s->rbio, &fd);
 
-            if (ret <= 0) {
+            if (fd < 0) {
                 /* NTLS only support socket communication */
                 SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CONNECTION_IS_NTLS,
                             ERR_R_INTERNAL_ERROR);